To get to Son Toni from Palma de Mallorca (airport) you can take the following route by car:

Take the Ma-19 towards Inca. After about 8km you will meet the Ma-20.

Follow the Ma-20 and take the ramp to the Ma-13 towards Inca. Stay on the Ma-13 and then take the exit towards Crestatx and follow the signs to Son Toni. 

Follow the road and then turn onto Carrer del Romani (signs for Son Toni) and follow the road until you reach number 24.

The journey takes about 35-40 minutes.